org.bootchart.parser.linux
Class ProcDiskStatParser

java.lang.Object
  org.bootchart.parser.linux.ProcDiskStatParser

public class ProcDiskStatParser
extends Object

ProcDiskStatParser parses log files produced by logging the output of /proc/diskstats. The samples contain information about disk IO activity.

Constructor Summary

ProcDiskStatParser()

Method Summary

static double	getMaxDiskTPut(List ioSampleList) Returns the maximum throughput seen in the iostat sample list.
static Stats	parseLog(InputStream is, int numCpu) Parses the proc_diskstats.log file.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ProcDiskStatParser

public ProcDiskStatParser()

Method Detail

parseLog

public static Stats parseLog(InputStream is,
                             int numCpu)
                      throws IOException

Parses the proc_diskstats.log file. The output from /proc/diskstat is used to collect the disk statistics.

Parameters:

is - the input stream to read from

numCpu - number of processors

Returns:

disk statistics (DiskUtilSample and DiskTPutSample samples)

Throws:

IOException - if an I/O error occurs

getMaxDiskTPut

public static double getMaxDiskTPut(List ioSampleList)

Returns the maximum throughput seen in the iostat sample list.

Parameters:

ioSampleList - iostat sample list

Returns:

maximum throughput